JP2011195320A - Belt for conveyor and belt conveyor for conveying sediment - Google Patents

Belt for conveyor and belt conveyor for conveying sediment Download PDF

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JP2011195320A
JP2011195320A JP2010066788A JP2010066788A JP2011195320A JP 2011195320 A JP2011195320 A JP 2011195320A JP 2010066788 A JP2010066788 A JP 2010066788A JP 2010066788 A JP2010066788 A JP 2010066788A JP 2011195320 A JP2011195320 A JP 2011195320A
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conveyor
belt
conveyor belt
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JP5504025B2 (en
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Kazuhiko Matoba
一彦 的場
Shusaku Nakagawa
周作 仲川
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Bando Chemical Industries Ltd
Obayashi Corp
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Obayashi Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a belt for a conveyor which comprises a large trough index though the width is small and a large tensile strength, and also provide a belt conveyor for conveying sediment.SOLUTION: This belt 1 for a conveyor includes a core canvas 9 formed by knitting warp 7 and weft 8 and cover rubbers 10, 11 installed so as to cover the upper and lower surfaces of the core canvas 9, respectively. The core canvas 9 is formed so that the density factors of the warp 7 and the weft 8 come within the range of 0.42-0.531. The cover rubbers 10, 11 is formed so that the hardnesses thereof come within the range of 57 or more and less than 63.

Description

本発明は、トンネルの掘削により生じた土砂を坑外へ搬送するための土砂搬送用ベルトコンベヤ及びこの土砂搬送用ベルトコンベヤに取り付けられるコンベヤ用ベルトに関する。   The present invention relates to a sediment transport belt conveyor for transporting sediment generated by excavation of a tunnel to the outside of a mine, and a conveyor belt attached to the sediment transport belt conveyor.

従来より、トンネルの掘削により生じた土砂は、土砂搬送用ベルトコンベヤによって坑外へ搬出されている。   Conventionally, earth and sand generated by excavation of a tunnel is carried out of the mine by a belt conveyor for earth and sand conveyance.

例えば、特許文献1には、一般的な土砂搬送用ベルトコンベヤが記載されている。しかし、小断面のトンネル内では、人間の移動や資機材運搬を阻害しないようにこれよりも幅の狭い土砂搬送用ベルトコンベヤの設置が要求される。また、大断面のトンネル内にも大型の土砂搬送用ベルトコンベヤを設置するとトンネル内が狭くなるので、やはり幅の狭い土砂搬送用ベルトコンベヤの設置が要求される。   For example, Patent Document 1 describes a general earth and sand conveyor belt conveyor. However, in a tunnel with a small cross section, it is required to install a belt conveyor for transporting earth and sand that is narrower than this so as not to hinder human movement and material transportation. In addition, when a large-sized earth and sand conveyor belt conveyor is installed in a tunnel having a large cross section, the inside of the tunnel becomes narrow, so that it is also necessary to install a narrow earth and sand conveyor belt conveyor.

土砂搬送用ベルトコンベヤの幅を狭くするには、コンベヤ用ベルトの幅も狭くなるが、その場合、キャリアローラーの馴染み(コンベヤ用ベルトの撓み量H)が小さくなるため、コンベヤ用ベルトの幅BWと撓み量Hの比率H/BWで求められるトラフ指数(JIS K6322)も小さくなって、土砂がコンベヤ用ベルトからこぼれ落ちてしまい、搬送性能が低下してしまう。一方、搬送性能を向上させるためには、コンベヤ用ベルトを軟らかくして撓み量Hを大きくし、トラフ指数を大きくすることが考えられるが、そうするとコンベヤ用ベルトが伸びやすくなって引張り強度が低下してしまい耐久性が劣化したり、コンベア用ベルトを途中で支持しながら回転を補助するための駆動プーリーが多数必要になる。   In order to reduce the width of the conveyor belt for earth and sand, the width of the conveyor belt is also reduced. In this case, the familiarity of the carrier roller (the amount of deflection H of the conveyor belt) is reduced. Also, the trough index (JIS K6322) obtained by the ratio H / BW of the deflection amount H becomes small, so that the earth and sand spill out from the conveyor belt, and the conveyance performance deteriorates. On the other hand, in order to improve the conveyance performance, it is conceivable to soften the conveyor belt and increase the amount of deflection H and increase the trough index. However, this makes the conveyor belt easy to stretch and the tensile strength decreases. As a result, durability is deteriorated, and a large number of drive pulleys are required to assist rotation while supporting the conveyor belt in the middle.

特開2000−177822号公報JP 2000-177822 A

このように、従来、トラフ指数が大きく、かつ、引張り強度が大きいという性能を満たすコンベヤ用ベルトを実現することが困難であったため、トラフ指数及び引張り強度を共に両立させるという発想が無く、幅の狭い土砂搬送用ベルトコンベヤは存在しなかった。   Thus, since it has been difficult to realize a conveyor belt that satisfies the performance of having a large trough index and a high tensile strength, there is no idea that both the trough index and the tensile strength are compatible. There was no narrow conveyor belt conveyor.

そこで、本発明は、上記の問題点を鑑みてなされたものであり、幅が狭くてもトラフ指数が大きく、かつ、引張り強度が大きいコンベヤ用ベルト及びそれを備えた土砂搬送用ベルトコンベヤを提供することを目的とする。   Therefore, the present invention has been made in view of the above problems, and provides a conveyor belt having a large trough index and a high tensile strength even when the width is narrow, and a sediment conveyor belt conveyor including the same. The purpose is to do.

本発明者らは、コンベヤ用ベルトの心体帆布の密度係数やカバーゴムの硬度及び厚さがそれぞれ異なる複数のベルトを作成し、それらの強度試験等を行うことにより、所定の条件において、トラフ指数及び引張り強度を両立させることができるという知見を得て本発明の構成としたものである。   The present inventors made a plurality of belts having different density coefficients of the core canvas of the conveyor belt and the hardness and thickness of the cover rubber, and carried out a strength test or the like to perform the trough in a predetermined condition. The knowledge that both the index and the tensile strength can be obtained is obtained and the configuration of the present invention is obtained.

なお、密度係数とは、図6に示すように、心体帆布の詰まり方の程度を示すものであり、次式(1)にて算出される。
密度係数=縦密度係数×横密度係数 ・・・(1)
ここで、縦密度係数及び横密度係数は、それぞれ次式(2)、(3)にて算出される。
縦密度係数=縦糸打込本数(本/50mm)×(縦糸直径(mm)+横糸直径(mm))/50mm ・・・(2)
横密度係数=横糸打込本数(本/50mm)×(縦糸直径(mm)+横糸直径(mm))/50mm ・・・(3)
The density coefficient indicates the degree of clogging of the core canvas as shown in FIG. 6 and is calculated by the following equation (1).
Density coefficient = longitudinal density coefficient x lateral density coefficient (1)
Here, the longitudinal density coefficient and the lateral density coefficient are calculated by the following equations (2) and (3), respectively.
Longitudinal density coefficient = number of warp driven (number / 50 mm) × (warp diameter (mm) + weft diameter (mm)) / 50 mm (2)
Lateral density coefficient = Number of wefts driven (number / 50 mm) × (warp diameter (mm) + weft diameter (mm)) / 50 mm (3)

また、硬度は、JIS K 6253デュロメータ硬さタイプAで定められた試験方法により測定する。   The hardness is measured by a test method defined by JIS K 6253 durometer hardness type A.

すなわち、本発明は、トンネルの掘削により生じた土砂を搬送するための土砂搬送用ベルトコンベヤに用いられるコンベヤ用ベルトであって、
縦糸と横糸とを編み込むことにより形成され、これら両糸の密度係数が0.42以上0.531以下である心体帆布と、
硬度が57以上63未満で、前記心体帆布の上面及び下面をそれぞれ覆うように設けられた一対のカバーゴムと、
を備えることを特徴とする。
That is, the present invention is a conveyor belt used in a sediment transport belt conveyor for transporting sediment generated by excavation of a tunnel,
A core canvas formed by weaving warp and weft, and the density coefficient of these both yarns being 0.42 or more and 0.531 or less,
A pair of cover rubbers having a hardness of 57 or more and less than 63 and provided to cover the upper and lower surfaces of the core canvas,
It is characterized by providing.

本発明によれば、コンベヤ用ベルトのトラフ指数を従来品と比べて大きくすることができるため、幅の狭い土砂搬送用ベルトコンベヤに設置しても、土砂をこぼれ落とすことなく搬送することができる。したがって、大断面のトンネルには勿論のこと、小断面のトンネルにも土砂搬送用ベルトコンベヤを設置することができる。
また、引張り強度を従来品と比べて大きくすることができるため、従来よりもコンベヤ用ベルトの耐久性が向上するので、接着作業や交換作業等の手間及び時間を低減することができる。したがって、トンネルの掘削を効率良く行うことができる。
また、カバーゴムの硬度が57以上63未満でコンベヤ用ベルトはあまり撓まないため、駆動プーリー間の距離を長くして、駆動プーリーの数を低減することができる。
According to the present invention, since the trough index of the conveyor belt can be increased as compared with the conventional product, even when the belt is installed on a narrow earth and sand conveying belt conveyor, the earth and sand can be conveyed without spilling. . Therefore, a sediment conveyor belt conveyor can be installed not only in a tunnel with a large cross section but also in a tunnel with a small cross section.
Further, since the tensile strength can be increased as compared with the conventional product, the durability of the conveyor belt is improved as compared with the conventional product, so that it is possible to reduce the labor and time for the bonding work and the exchange work. Therefore, the tunnel can be excavated efficiently.
Moreover, since the hardness of the cover rubber is 57 or more and less than 63 and the conveyor belt does not bend much, the distance between the drive pulleys can be increased to reduce the number of drive pulleys.

また、本発明は、土砂搬送用ベルトコンベヤであって、上述したコンベヤ用ベルトを備えることを特徴とする。   Moreover, this invention is a sediment conveyor belt conveyor, Comprising: The belt for conveyors mentioned above is provided, It is characterized by the above-mentioned.

本発明によれば、幅の狭いコンベヤ用ベルトを用いることによって従来品よりも幅の狭い土砂搬送用ベルトコンベヤを製作することができる。そして、土砂搬送用ベルトコンベヤの幅を狭くできたことにより、大断面のトンネルには勿論のこと、小断面のトンネル内にも土砂搬送用ベルトコンベヤを設置することができる。   According to the present invention, by using a conveyor belt having a narrow width, it is possible to manufacture a sediment conveyor belt conveyor having a narrower width than that of a conventional product. And since the width | variety of the belt conveyor for earth and sand conveyance was able to be narrowed, the belt conveyor for earth and sand conveyance can be installed not only in the tunnel of a large cross section but in the tunnel of a small cross section.

本発明によれば、幅が狭くてもトラフ指数が大きく、かつ、引張り強度が大きいコンベヤ用ベルト及びこのベルトを備えた土砂搬送用ベルトコンベヤを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, even if a width | variety is narrow, a trough index | exponent is large and the tensile strength is large, and the belt conveyor for earth and sand conveyance provided with this belt can be provided.

本実施形態にかかるコンベヤ用ベルトを備えた土砂搬送用ベルトコンベヤを示す図である。It is a figure which shows the earth-and-sand conveyance belt conveyor provided with the belt for conveyors concerning this embodiment. コンベヤ用ベルトの斜視断面図である。It is a perspective sectional view of the belt for conveyors. コンベヤ用ベルトを備えた土砂搬送用ベルトコンベヤを小断面のトンネル内に設置した状態を示す図である。It is a figure which shows the state which installed the belt conveyor for earth and sand conveyance provided with the belt for conveyors in the tunnel of a small cross section. 土砂搬送用ベルトコンベヤの送り側ベルト付近を拡大して示す断面図である。It is sectional drawing which expands and shows the sending side belt vicinity of the belt conveyor for earth and sand conveyance. 上半部が各試験体No.1〜No.6及び従来品No.0の仕様を示し、下半部が試験体No.1〜試験体No.6及び従来品No.0のトラフ指数、心体帆布の引張り強度、カバーゴムの引張り強度及び引裂強度の値を示す図である。The upper half is each specimen No. 1-No. 6 and the conventional product No. No. 0 is shown, and the lower half shows the specimen No. 1 to Specimen No. 1 6 and the conventional product No. It is a figure which shows the value of the trough index | exponent of 0, the tensile strength of a core canvas, the tensile strength of a cover rubber | gum, and tear strength. 心体帆布の密度係数の算出方法を説明するための図である。It is a figure for demonstrating the calculation method of the density coefficient of a core body canvas.

以下、本発明の好ましい実施形態について図面を用いて詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図1は、本実施形態にかかるコンベヤ用ベルト1を備えた土砂搬送用ベルトコンベヤ2を示す図である。
図1に示すように、土砂搬送用ベルトコンベヤ2は、上流側端部に配置されたヘッドプーリー3と、下流側端部に配置された駆動用プーリー4と、両プーリー3、4間を回転するように巻き付けられたコンベヤ用ベルト1と、駆動用プーリー4を駆動するための駆動手段6と、を備えている。
FIG. 1 is a view showing a sediment conveyor belt conveyor 2 provided with a conveyor belt 1 according to the present embodiment.
As shown in FIG. 1, the earth and sand conveyor belt conveyor 2 rotates between a head pulley 3 disposed at an upstream end, a driving pulley 4 disposed at a downstream end, and both pulleys 3 and 4. The conveyor belt 1 wound in such a manner as described above and driving means 6 for driving the driving pulley 4 are provided.

図2は、コンベヤ用ベルト1の斜視断面図である。
図2に示すように、コンベヤ用ベルト1は、縦糸7と横糸8とを編み込むことにより形成された心体帆布9と、心体帆布9の上面及び下面をそれぞれ覆うように設けられたカバーゴム10、11と、を備えている。
FIG. 2 is a perspective sectional view of the conveyor belt 1.
As shown in FIG. 2, the conveyor belt 1 includes a core body canvas 9 formed by weaving warp yarns 7 and weft yarns 8, and cover rubber provided so as to cover the upper surface and the lower surface of the core body canvas 9. 10 and 11.

心体帆布9は、縦糸7及び横糸8の密度係数が0.42以上0.531以下の範囲になるように形成されたものを用いる。   The core body canvas 9 is formed so that the density coefficients of the warp yarns 7 and the weft yarns 8 are in the range of 0.42 to 0.531.

心体帆布9の上面及び下面を覆うカバーゴム10、11は、心体帆布9に接着材で固着されている。心体帆布9の上面に固着されたカバーゴム10上に土砂が載置される。
このカバーゴム10、11は、硬度が57以上63未満の範囲になるように形成されたものを用いる。
Cover rubbers 10 and 11 covering the upper and lower surfaces of the core canvas 9 are fixed to the core canvas 9 with an adhesive. The earth and sand are placed on the cover rubber 10 fixed to the upper surface of the core canvas 9.
The cover rubbers 10 and 11 are formed so as to have a hardness in the range of 57 or more and less than 63.

なお、本実施形態においては、心体帆布9の上面及び下面を覆うカバーゴム10、11として、厚さがそれぞれ5.0mm、2.0mmのものを用いたがこれに限定されるものではなく、例えば、上面のカバーゴム10の厚さを4.0mmとしても良い。   In the present embodiment, the cover rubbers 10 and 11 that cover the upper and lower surfaces of the core canvas 9 have thicknesses of 5.0 mm and 2.0 mm, respectively, but are not limited thereto. For example, the thickness of the upper cover rubber 10 may be 4.0 mm.

図3は、コンベヤ用ベルト1を備えた土砂搬送用ベルトコンベヤ2を小断面のトンネルT内に設置した状態を示す図である。また、図4は、土砂搬送用ベルトコンベヤ2の送り側ベルト1a付近を拡大して示す断面図である。
図3及び図4に示すように、小断面のトンネルT内に設置されている土砂搬送用ベルトコンベヤ2の幅は、約450mmであり、一般的な土砂搬送用ベルトコンベヤの幅(約600mm)よりも小さい。
コンベヤ用ベルト1の送り側ベルト1aは、土砂を両側から挟み込んで落とさないように、キャリアローラー5に沿って略コの字形に変形することが望ましい。コンベヤ用ベルト1の変形性能を評価するために、本実施形態においては、トラフ指数を用いた。
FIG. 3 is a diagram showing a state in which the earth and sand conveying belt conveyor 2 including the conveyor belt 1 is installed in a tunnel T having a small cross section. FIG. 4 is an enlarged cross-sectional view showing the vicinity of the feeding belt 1a of the earth and sand conveying belt conveyor 2. As shown in FIG.
As shown in FIGS. 3 and 4, the width of the earth and sand conveyor belt conveyor 2 installed in the tunnel T having a small cross section is about 450 mm, and the width of an ordinary earth and sand conveyor belt conveyor (about 600 mm). Smaller than.
It is desirable that the feed-side belt 1a of the conveyor belt 1 is deformed into a substantially U-shape along the carrier roller 5 so as not to drop earth sand from both sides. In order to evaluate the deformation performance of the conveyor belt 1, the trough index is used in the present embodiment.

土砂搬送用ベルトコンベヤ2は、送り側ベルト1aの幅方向中央部分がメインキャリアローラー5aに載置され、幅方向左右両側部分がサイドキャリアローラー5bにそれぞれ載置される。かかる際に、図4に向かって送り側ベルト1aの幅方向左側部分、幅方向中央部分、幅方向右側部分はそれぞれ1/3ずつ均等にメインキャリアローラー5a及びサイドキャリアローラー5bに載置される。本実施形態においては、メインキャリアローラー5aに対するサイドキャリアローラー5bの傾斜角度を30°としたが、この値に限定されるものではなく、搬送する土砂の土質等に基づいて設計等により決定される。   In the earth-and-sand transport belt conveyor 2, the central portion in the width direction of the feed belt 1a is placed on the main carrier roller 5a, and the left and right side portions in the width direction are placed on the side carrier rollers 5b. At this time, the width direction left side portion, the width direction center portion, and the width direction right side portion of the sending side belt 1a are placed on the main carrier roller 5a and the side carrier roller 5b equally by 1/3 each as viewed in FIG. . In the present embodiment, the inclination angle of the side carrier roller 5b with respect to the main carrier roller 5a is set to 30 °, but is not limited to this value, and is determined by design or the like based on the soil quality of the earth and sand to be conveyed. .

幅が、例えば、450mmのコンベヤ用ベルト1をメインキャリアローラー5a及びサイドキャリアローラー5b上に載置した場合におけるコンベヤ用ベルト1のトラフ指数を次式(4)にて算出する。
T= H/BW ・・・(4)
=(SINα×BW/3)/BW
=(SIN30×450/3)/450
= 75/450
= 0.167
ここで、T:トラフ指数、H:コンベヤ用ベルト1の撓み量、α:メインキャリアローラー5aに対するサイドキャリアローラー5bの傾斜角度(°)、BW:コンベヤ用ベルト1の幅(mm)である。
For example, the trough index of the conveyor belt 1 when the conveyor belt 1 having a width of 450 mm is placed on the main carrier roller 5a and the side carrier roller 5b is calculated by the following equation (4).
T = H / BW (4)
= (SINα × BW / 3) / BW
= (SIN30 × 450/3) / 450
= 75/450
= 0.167
Here, T: trough index, H: deflection amount of the conveyor belt 1, α: inclination angle (°) of the side carrier roller 5 b with respect to the main carrier roller 5 a, and BW: width (mm) of the conveyor belt 1.

この結果より、トラフ指数が、0.167(以下、この値を目標値という)以上になるコンベヤ用ベルト1を用いることが望ましい。   From this result, it is desirable to use the conveyor belt 1 having a trough index of 0.167 (hereinafter referred to as a target value) or more.

次に、上述したコンベヤ用ベルト1の性能について検討した結果について説明する。心体帆布9の密度係数、カバーゴム10、11の硬度及び厚さの異なる複数のコンベヤ用ベルト1の試験体を製作し、これらの試験体のトラフ指数、引張り強度、引裂強度を測定した。まず、各試験体を構成する心体帆布9の密度係数、カバーゴム10、11の硬度及び厚さについて説明し、次に、各試験体の測定結果について説明する。   Next, the result of examining the performance of the above-described conveyor belt 1 will be described. A plurality of test specimens of the conveyor belt 1 having different density coefficients of the core canvas 9, the hardness of the cover rubbers 10 and 11 and the thickness thereof were manufactured, and the trough index, tensile strength, and tear strength of these test specimens were measured. First, the density coefficient of the core canvas 9 constituting each specimen and the hardness and thickness of the cover rubbers 10 and 11 will be described, and then the measurement results of each specimen will be described.

図5は、上半部が各試験体No.1〜No.6及び従来品No.0の仕様を示し、下半部が試験体No.1〜No.6及び従来品No.0のトラフ指数、心体帆布9の引張り強度、カバーゴム10、11の引張り強度及び引裂強度の測定結果を示す図である。   In FIG. 5, the upper half is each specimen No. 1-No. 6 and the conventional product No. No. 0 is shown, and the lower half shows the specimen No. 1-No. 6 and the conventional product No. It is a figure which shows the measurement result of the trough index of 0, the tensile strength of the core canvas 9, the tensile strength of the cover rubbers 10 and 11, and the tear strength.

図5の上半部に示すように、心体帆布9の密度係数、カバーゴム10、11の硬度及び厚さがそれぞれ異なる複数の試験体No.1〜No.6を作成した。   As shown in the upper half of FIG. 5, a plurality of test specimens No. 1 having different density coefficients of the core canvas 9 and different hardnesses and thicknesses of the cover rubbers 10 and 11 are used. 1-No. 6 was created.

そして、これらの各試験体No.1〜No.6のトラフ指数、心体帆布9の引張り強度、カバーゴム10、11の引張り強度及び引裂強度をJIS規格に定められた手法にて測定する。具体的には、心体帆布9の引張り強度、カバーゴム10、11の引張り強度及び引裂強度は、それぞれJIS K 6322、JIS K 6251、JIS K 6252で定められた試験方法により測定する。   And these each test body No. 1-No. A trough index of 6, a tensile strength of the core canvas 9, a tensile strength and a tear strength of the cover rubbers 10 and 11 are measured by a method defined in JIS standards. Specifically, the tensile strength of the core canvas 9 and the tensile strength and tear strength of the cover rubbers 10 and 11 are measured by test methods defined by JIS K 6322, JIS K 6251, and JIS K 6252, respectively.

なお、比較検討のために、従来の土砂運搬用ベルトNo.0(以下、従来品の試験体No.0という。)の測定結果についても記載した。この測定結果は、既に測定済みのデータを用いた。従来品の試験体No.0は、図5の下半部に示すように、JIS等で定められた条件(心体帆布9の引張り強度が630N/mm以上、カバーゴム10、11の引張り強度が18Mpa以上、カバーゴム10、11の引裂強度が50N/mm以上であること)は満たしているが、トラフ指数が目標値よりも小さいため、本実施形態にかかるコンベヤ用ベルト1としての使用には適していない。   For comparison, the conventional soil transport belt No. The measurement result of 0 (hereinafter referred to as conventional specimen No. 0) was also described. As this measurement result, already measured data was used. Conventional specimen No. As shown in the lower half of FIG. 5, 0 is a condition defined by JIS or the like (the tensile strength of the core canvas 9 is 630 N / mm or more, the tensile strength of the cover rubbers 10 and 11 is 18 Mpa or more, and the cover rubber 10 However, since the trough index is smaller than the target value, it is not suitable for use as the conveyor belt 1 according to the present embodiment.

<試験体No.1及びNo.2について>
送り側ベルト1aが略コの字の形状(図4参照)になるようにトラフ指数を大きくする(すなわち、土壌搬送用ベルト1の撓み量Hが大きくなるようにする)ためには、従来品No.0と比べて、心体帆布9の密度係数を小さくすれば良いと考えて、心体帆布9の密度係数を従来品No.0よりも小さくした。具体的には、試験体No.1及びNo.2の心体帆布9の密度係数をそれぞれ、0.531、0.454とした。
なお、本発明者らは、心体帆布9の密度係数を0.42未満にすると、ベルトとして機能しないという知見を得ているので、密度係数は0.42(以下、この値を管理値という)以上とする。
<Specimen No. 1 and no. About 2>
In order to increase the trough index so that the feeding side belt 1a has a substantially U shape (see FIG. 4) (that is, to increase the bending amount H of the soil conveying belt 1), a conventional product is used. No. The density coefficient of the core body canvas 9 is considered to be smaller than that of the conventional product No. It was smaller than 0. Specifically, the test specimen No. 1 and no. The density coefficients of the core canvas 9 of 2 were 0.531 and 0.454, respectively.
In addition, since the present inventors have obtained the knowledge that if the density coefficient of the core canvas 9 is less than 0.42, it does not function as a belt, the density coefficient is 0.42 (hereinafter, this value is referred to as a management value). ) Or more.

<試験体No.3及びNo.4について>
トラフ指数を大きくするためには、従来品No.0と比べて、カバーゴム10の厚さを薄くすれば良いと考えて、カバーゴム10の厚さを従来品No.0よりも薄くした。具体的には、試験体No.3及びNo.4のカバーゴム10の厚さを4.0mmとした。
なお、カバーゴム10の厚さの影響を明確にするために、試験体No.3及び試験体No.4の心体帆布9の密度係数をそれぞれ試験体No.1、試験体No.2と同じ値にした。
<Specimen No. 3 and no. About 4>
In order to increase the trough index, the conventional product no. The thickness of the cover rubber 10 is considered to be thinner than that of the conventional product No. 0. It was thinner than zero. Specifically, the test specimen No. 3 and no. The thickness of the cover rubber 10 was set to 4.0 mm.
In addition, in order to clarify the influence of the thickness of the cover rubber 10, the test specimen No. 3 and Specimen No. 4 for each of the test piece Nos. 1. Specimen No. The same value as 2.

<試験体No.5及びNo.6について>
トラフ指数を大きくするためには、従来品No.0と比べて、カバーゴム10、11の硬度を小さくすれば良いと考えて、カバーゴム10、11の硬度を従来品No.0よりも小さくした。具体的には、試験体No.5及びNo.6のカバーゴム10、11の硬度をそれぞれ54、57とした。
なお、カバーゴム10、11の硬度の影響を明確にするために、試験体No.5及びNo.6の心体帆布9の密度係数を試験体No.2と同じ値にした。
<Specimen No. 5 and no. About 6>
In order to increase the trough index, the conventional product no. The hardness of the cover rubbers 10 and 11 is considered to be smaller than that of the conventional rubber No. 0. It was smaller than 0. Specifically, the test specimen No. 5 and no. The hardness of the cover rubbers 10 and 11 of 6 was set to 54 and 57, respectively.
In addition, in order to clarify the influence of the hardness of the cover rubbers 10 and 11, the test body No. 5 and no. The density coefficient of the core canvas 9 in FIG. The same value as 2.

次に、試験体No.1〜No.6のトラフ指数、心体帆布9の引張り強度、カバーゴム10、11の引張り強度及び引裂強度を測定した結果について説明する。   Next, the test specimen No. 1-No. The results of measuring the trough index of 6, the tensile strength of the core canvas 9, the tensile strength and the tear strength of the cover rubbers 10 and 11 will be described.

<試験体No.1及びNo.2について>
図5の下半部に示すように、試験体No.1及びNo.2のトラフ指数は、従来品No.0のトラフ指数よりもやや大きくなったが、目標値よりも小さかった。具体的には、試験体No.1及びNo.2のトラフ指数は、それぞれ0.140、0.148であった。
したがって、心体帆布9の密度係数を小さくすることにより、トラフ指数は大きくなることがわかる。
<Specimen No. 1 and no. About 2>
As shown in the lower half of FIG. 1 and no. The trough index of 2 is the conventional product No. It was slightly larger than the trough index of 0, but smaller than the target value. Specifically, the test specimen No. 1 and no. The trough index of 2 was 0.140 and 0.148, respectively.
Therefore, it can be seen that the trough index increases as the density coefficient of the core canvas 9 decreases.

<試験体No.3及びNo.4について>
試験体No.3及びNo.4のトラフ指数は、従来品No.0のトラフ指数よりもやや大きくなったが、目標値よりも小さかった。具体的には、試験体No.3及びNo.4のトラフ指数は、それぞれ0.137、0.150であった。
また、カバーゴム10の厚さのみが異なる試験体No.3と試験体No.1と、試験体No.4と試験体No.2と、をそれぞれ比較すると、カバーゴム10を薄くしても、トラフ指数は、多少大きくなるもののほとんど変化していない。
したがって、カバーゴム10を薄くしてもトラフ指数を大きくする効果は小さいことがわかる。
<Specimen No. 3 and no. About 4>
Specimen No. 3 and no. The trough index of 4 is the conventional product no. It was slightly larger than the trough index of 0, but smaller than the target value. Specifically, the test specimen No. 3 and no. The trough index of 4 was 0.137 and 0.150, respectively.
In addition, the test specimens No. 1 that differ only in the thickness of the cover rubber 10 were used. 3 and specimen No. 1 and test body No. 4 and specimen No. 2 and 2, even if the cover rubber 10 is thinned, the trough index is slightly increased, although it is somewhat increased.
Therefore, it can be seen that the effect of increasing the trough index is small even if the cover rubber 10 is thinned.

<試験体No.5及びNo.6について>
試験体No.5及びNo.6のトラフ指数は、従来品No.0のトラフ指数よりも大きく、かつ、目標値を超えていた。具体的には、試験体No.5及びNo.6のトラフ指数はそれぞれ0.215、0.194であった。
したがって、カバーゴム10、11の硬度を小さくすることにより、トラフ指数は大きくなることがわかる。
しかしながら、試験体No.5の引裂強度が規定値よりも小さくなった。この結果より、カバーゴム10、11の硬度を54(試験体No.5の硬度)よりも大きくすることが好ましい。
一方、試験体No.6は、トラフ指数が目標値よりも大きく、かつ、その他の項目についても上記JIS等で定められた条件よりも大きくなった。したがって、試験体No.6は、本実施形態にかかるコンベヤ用ベルト1としての使用に適している。
<Specimen No. 5 and no. About 6>
Specimen No. 5 and no. The trough index of 6 is the conventional product no. It was larger than the trough index of 0 and exceeded the target value. Specifically, the test specimen No. 5 and no. The trough index of 6 was 0.215 and 0.194, respectively.
Therefore, it can be seen that the trough index is increased by reducing the hardness of the cover rubbers 10 and 11.
However, the specimen No. The tear strength of 5 was smaller than the specified value. From this result, it is preferable that the hardness of the cover rubbers 10 and 11 is larger than 54 (the hardness of the test body No. 5).
On the other hand, the specimen No. In No. 6, the trough index was larger than the target value, and other items were also larger than the conditions defined by the above JIS. Therefore, the test specimen No. No. 6 is suitable for use as the conveyor belt 1 according to the present embodiment.

<試験体No.1〜No.6全体についてのまとめ>
===心体帆布9の密度係数について===
心体帆布9の密度係数を従来品No.0よりも小さくした試験体No.1〜No.6は、すべてトラフ指数が従来品No.0よりも小さくなった。
本実験では、試験体No.1〜No.6のうち、最も大きい密度係数を0.531(試験体No.1及びNo.3)としたので、これを考慮して、密度係数の上限を0.531以下とした。また、心体帆布9の下限を管理値である0.42以上とした。
===カバーゴム10、11の硬度について===
上述したように、試験体No.5の結果より、カバーゴム10、11の硬度を54にすると引裂強度が規定値を満たさなくなるため、カバーゴム10、11の硬度の下限を54よりも大きくすることとした。さらに、安全性を考慮して57(試験体No.6の硬度)以上とした。
また、カバーゴム10、11の硬度の上限を63(試験体No.1〜No.4の硬度)未満とした。上述したように、カバーゴム10、11の硬度を変化させるとトラフ指数が大きく変化するため、カバーゴム10、11の硬度の上限を63(試験体No.1〜No.4の硬度)未満とし、かつ、心体帆布9の密度係数を上記範囲内にすることにより、トラフ指数の目標値を超えることができると考えられる。
===カバーゴム10の厚さについて===
カバーゴム10の厚さが異なる試験体No.1と試験体No.3と、試験体No.2と試験体No.4と、をそれぞれ比較すると、カバーゴム10の厚さを薄くしても、トラフ指数はほとんど変化していないことがわかる。
また、カバーゴム10の厚さ及び硬度が異なる試験体No.4と試験体No.5と、試験体No.4と試験体No.6と、をそれぞれ比較すると、カバーゴム10が厚くても硬度が小さいNo.5及びNo.6のトラフ指数が大きくなっている。
これらの結果より、カバーゴム10を薄くしてもトラフ指数を大きくする効果は小さいと考えられる。
<Specimen No. 1-No. Summary of the whole 6>
=== About the density coefficient of the core canvas 9 ===
The density coefficient of the core canvas 9 is the same as the conventional product No. Specimen No. smaller than 0 1-No. No. 6 has a trough index of no. It became smaller than 0.
In this experiment, the test specimen No. 1-No. 6, the largest density coefficient was set to 0.531 (test bodies No. 1 and No. 3), so that the upper limit of the density coefficient was set to 0.531 or less in consideration of this. Further, the lower limit of the core canvas 9 is set to 0.42 or more which is a management value.
=== Hardness of Cover Rubbers 10 and 11 ===
As described above, the test specimen No. From the result of 5, since the tear strength does not satisfy the specified value when the hardness of the cover rubbers 10 and 11 is 54, the lower limit of the hardness of the cover rubbers 10 and 11 is made larger than 54. Furthermore, in consideration of safety, it was set to 57 (the hardness of specimen No. 6) or more.
Moreover, the upper limit of the hardness of the cover rubbers 10 and 11 was set to less than 63 (the hardness of the specimens No. 1 to No. 4). As described above, when the hardness of the cover rubbers 10 and 11 is changed, the trough index changes greatly. Therefore, the upper limit of the hardness of the cover rubbers 10 and 11 is less than 63 (the hardness of the specimens No. 1 to No. 4). Moreover, it is considered that the target value of the trough index can be exceeded by setting the density coefficient of the core canvas 9 within the above range.
=== About the thickness of the cover rubber 10 ===
Specimens with different thicknesses of the cover rubber 10 1 and specimen No. 3 and specimen No. 2 and test body No. 4 and 4 respectively, it can be seen that the trough index hardly changes even when the cover rubber 10 is made thinner.
In addition, the test specimens No. 1 and No. 3 with different thicknesses and hardnesses of the cover rubber 10 were used. 4 and specimen No. 5 and test body No. 4 and specimen No. 6 and No. 6 having a small hardness even when the cover rubber 10 is thick. 5 and no. The trough index of 6 is increasing.
From these results, it is considered that the effect of increasing the trough index is small even if the cover rubber 10 is thinned.

したがって、上述した試験結果より、コンベヤ用ベルト1は、密度係数が0.42以上0.531以下の心体帆布9と、硬度が57以上63未満のカバーゴム10、11と、を備えることによって、トラフ指数が0.167以上になることがわかる。   Therefore, from the above test results, the conveyor belt 1 includes the core canvas 9 having a density coefficient of 0.42 to 0.531 and the cover rubbers 10 and 11 having a hardness of 57 to 63. It can be seen that the trough index is 0.167 or more.

本実施形態にかかるコンベヤ用ベルト1によれば、トラフ指数を従来品と比べて大きくすることができるため、幅の狭い土砂搬送用ベルトコンベヤ2に設置しても、土砂をこぼれ落とすことなく搬送することができる。したがって、小断面のトンネルT内に土砂搬送用ベルトコンベヤ2を設置することができる。
また、カバーゴム10、11の引張り強度を従来品と比べて大きくすることができるため、従来よりもコンベヤ用ベルト1の耐久性能が向上するので、接着作業や交換作業等の手間及び時間を低減することができる。したがって、トンネルTの掘削を効率良く行うことができる。
According to the conveyor belt 1 according to the present embodiment, since the trough index can be increased as compared with the conventional product, even if it is installed on the narrow earth-and-sand conveyor belt conveyor 2, it conveys the earth and sand without falling down. can do. Therefore, the sediment conveyor belt conveyor 2 can be installed in the tunnel T having a small cross section.
Further, since the tensile strength of the cover rubbers 10 and 11 can be increased as compared with the conventional products, the durability performance of the conveyor belt 1 is improved as compared with the conventional products, so that the labor and time for bonding work and replacement work are reduced. can do. Therefore, the tunnel T can be excavated efficiently.

1 コンベヤ用ベルト
1a 送り側ベルト
2 土砂搬送用ベルトコンベヤ
3 ヘッドプーリー
4 駆動用プーリー
5 キャリアローラー
5a メインキャリアローラー
5b サイドキャリアローラー
6 駆動手段
7 縦糸
8 横糸
9 心体帆布
10 カバーゴム
11 カバーゴム
T トンネル
DESCRIPTION OF SYMBOLS 1 Conveyor belt 1a Feeding side belt 2 Sediment conveyance belt conveyor 3 Head pulley 4 Driving pulley 5 Carrier roller 5a Main carrier roller 5b Side carrier roller 6 Driving means 7 Warp yarn 8 Weft 9 Heart body canvas 10 Cover rubber 11 Cover rubber T tunnel

Claims (2)

トンネルの掘削により生じた土砂を搬送するための土砂搬送用ベルトコンベヤに用いられるコンベヤ用ベルトであって、
縦糸と横糸とを編み込むことにより形成され、これら両糸の密度係数が0.42以上0.531以下である心体帆布と、
硬度が57以上63未満で、前記心体帆布の上面及び下面をそれぞれ覆うように設けられた一対のカバーゴムと、
を備えることを特徴とするコンベヤ用ベルト。
A conveyor belt used in a conveyor belt for conveying earth and sand generated by excavation of a tunnel,
A core canvas formed by weaving warp and weft, and the density coefficient of these both yarns being 0.42 or more and 0.531 or less,
A pair of cover rubbers having a hardness of 57 or more and less than 63 and provided to cover the upper and lower surfaces of the core canvas,
A conveyor belt, comprising:
請求項1に記載のコンベヤ用ベルトを備えることを特徴とする土砂搬送用ベルトコンベヤ。   A belt conveyor for earth and sand conveyance comprising the conveyor belt according to claim 1.
JP2010066788A 2010-03-23 2010-03-23 Conveyor belt and earth and sand conveyor belt conveyor Expired - Fee Related JP5504025B2 (en)

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JPH0564112U (en) * 1992-02-03 1993-08-24 バンドー化学株式会社 Conveyor belt
JPH0760877A (en) * 1993-06-18 1995-03-07 Mitsuboshi Belting Ltd Wide belt
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JP2000177822A (en) * 1998-12-10 2000-06-27 Ohbayashi Corp Booster unit of belt conveyer
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Publication number Priority date Publication date Assignee Title
JP2014058394A (en) * 2012-09-19 2014-04-03 Yokohama Rubber Co Ltd:The Conveyor belt, and monitoring system of conveyor belt

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